Lapis Lazuli by its binomial name is a crystalline aggregate composed largely of blue lazurite. It also will have pyrite and mica throughout it, which makes Lapis Lazuli look like a night sky. Lapis Lazuli used to be ground up to make ultramarine pigments for paint as early as the 11th century A.D. This stone of truth and friendship can be found from a true blue to deep blue with occurrences of purplish blue to blue-green. It was one of the first stones to be used for jewelry. It is found in Afghanistan, Egypt, Canada and Chile.
Reconsittued Lapis consists largely of barium sulfate and may or may not have mica in it.